SODIUM FLOW ENDURANCE TEST OF 37 ROD GRID-SPACED ASSEMBLIES

摘要

The main objectives of this endurance test were to determine the effect of long term exposure to high temperature, flowing sodium on:n• The structural integrity of the grid spacers;n• The adequacy of the grid spacer tabs to remain locked in the channel pockets;n• The fuel rod to grid spacer wearing surface;n• The relative merits of a staggered grid design versus a full grid design.